Constants in Double class « Double « Numbers « Development

Type	Field	Summary
static int	MAX_EXPONENT	Maximum exponent a finite double variable may have.
static double	MAX_VALUE	Largest positive finite value of type double.
static int	MIN_EXPONENT	Minimum exponent a normalized double variable may have.
static double	MIN_NORMAL	Smallest positive normal value of type double.
static double	MIN_VALUE	Smallest positive nonzero value of type double.
static double	NaN	Not-a-Number (NaN) value of type double.
static double	NEGATIVE_INFINITY	Negative infinity of type double.
static double	POSITIVE_INFINITY	Positive infinity of type double.
static int	SIZE	The number of bits used to represent a double value.
static Class	TYPE	The Class instance representing the primitive type double.

The following code finds out the min/max value a double type variable can have. It also prints out the size of a double value.


public class Main {
  public static void main(String[] args) {
    System.out.println(Double.MAX_VALUE);
    System.out.println(Double.MIN_VALUE);
    System.out.println(Double.SIZE);

  }
}


1.7976931348623157E308
4.9E-324
64


public class Main {
  public static void main(String[] args) {
    System.out.println(Double.MAX_EXPONENT);
    System.out.println(Double.MIN_EXPONENT);
    System.out.println(Double.MIN_NORMAL);

  }
}


1023
-1022
2.2250738585072014E-308

The following code uses the Double.NEGATIVE_INFINITY to check a double value.


public class Main {
  public static void main(String args[]) {

    double d = -10.0 / 0.0;
    if (d == Double.NEGATIVE_INFINITY) {
      System.out.println("d = " + d);
    }

  }
}


d = -Infinity